РЕШИТЕ СРОЧНО (3x+5)(4x-6), (5x-9y)(5x+9y), (0,72x+0,2)(0,6x-0,7) ОЧЕНЬ СРОЧНО
1. (3x+5)(4x-6)
12x²-18x+20x-30
12x²+2x-30
2. (5x-9y)(5x+9y)
(5x)²-(9y)²
25x²-81y²
3. (0,72x+0,2)(0,6x-0,7)
0.432x²-0.504x+0.12x-0.14
0.432x²-0.384x-0.14